[Liblas-devel] GPS time and intensity?
mateusz at loskot.net
Mon Oct 13 08:01:22 EDT 2008
Howard Butler wrote:
> On Oct 12, 2008, at 6:08 AM, Mateusz Łoskot wrote:
>> Jason Woolard wrote:
>>> Also, the GPS time seems to be rounding to the nearest second . My
>>> input file has data to 3 decimal places. Is there any way to carry
>>> that precision over?
>> Aren't LiDAR observations (pulses) measured in seconds with fractions
> I don't know the answer to this but the 1.0 and 1.1 specs say:
> "The GPS time is the double floating point time tag value at which the
> point was acquired."
> The spec isn't very clear on this, and while it is true that the
> <time.h> C functions don't deal with fractional seconds, it may be that
> vendors are using them. Maybe we should ask on the USGS board about
> this question and see what people say.
Good idea. I will ask.
Mateusz Loskot, http://mateusz.loskot.net
Charter Member of OSGeo, http://osgeo.org
More information about the Liblas-devel